Who needs a prenuptial agreement?

A prenup is especially valuable if one or both spouses have significant pre-marital assets (savings, property, investments, a business), an inheritance, student loans or debts, children from a prior relationship, or a large income disparity. It is also useful to clarify financial expectations and protect both parties.

What can a prenuptial agreement protect?

A prenup can protect: pre-marital assets (savings, real estate, investment accounts), business interests, intellectual property, inheritances (even future ones), gifts, and can specify how marital assets will be divided. It can also address debt responsibility and spousal support terms.

Is a prenuptial agreement enforceable?

Yes, if properly executed. Courts generally uphold prenups that are: entered into voluntarily (no duress), with full financial disclosure by both parties, signed well before the wedding (not last-minute), and not unconscionable. Requirements vary by state — most follow the Uniform Premarital Agreement Act (UPAA) or similar statutes.

What is the difference between community property and equitable distribution states?

Community property states (CA, TX, WA, AZ, NV, NM, ID, LA, WI) treat most assets acquired during marriage as equally owned by both spouses — divided 50/50 in divorce. Equitable distribution states divide marital assets 'fairly' (not necessarily equally) based on factors like income, marriage length, and contributions. Pre-marital assets are technically separate in both systems, but a prenup provides explicit legal protection.

How much does a prenuptial agreement cost?

A prenup typically costs $1,500–$10,000+ depending on complexity, attorney hourly rates in your area, whether both spouses use separate attorneys (recommended), and how contentious negotiations become. Simple agreements with limited assets cost less; complex ones involving businesses, trusts, or international assets cost more.

What is asset commingling and why does it matter?

Commingling occurs when separate (pre-marital) property becomes mixed with marital property — for example, depositing an inheritance into a joint account or using separate funds to improve a jointly-owned home. Once commingled, it can be difficult to trace and courts may treat it as marital property. A prenup explicitly designating assets as separate property prevents this problem.

Can a prenup protect future inheritances?

Yes. A well-drafted prenup can explicitly state that any future inheritance received by either spouse, even during the marriage, remains that spouse's separate property and is not subject to division in divorce. Without this clause, inherited assets that become commingled may lose their separate-property status.

When should a prenuptial agreement be signed?

Courts look unfavorably on prenups signed under time pressure. Best practice: begin discussions 6–12 months before the wedding, finalize and sign at least 30 days before the ceremony, and ensure both parties have had independent legal review. A prenup signed the night before the wedding can be challenged as signed under duress.

Prenuptial Agreement Calculator — Asset Protection Estimator

Assets & Marriage Details

State / Jurisdiction

Spouse 1 Pre-Marital Assets ($)

Spouse 2 Pre-Marital Assets ($)

Anticipated Marital Assets (total over marriage) ($)

Spouse 1 Annual Income ($)

Spouse 2 Annual Income ($)

Expected Years of Marriage

⚠️ Pre-marital assets are technically separate property under law in all states, but can become marital property through commingling. A prenup provides explicit legal protection.

Prenup Protection Value (Spouse 1)

Enter details to calculate

Divorce Settlement Estimate

S1 Without Prenup

S1 With Prenup

Protection Value

50 / 50

Marital Asset Split

S1 Pre-Marital Safe

S2 Pre-Marital Safe

State Division Rules

Select a state in the Calculator tab to highlight it here. All 50 states are shown below.

State	System	Marital Split	Commingling Risk	Key Prenup Statute

Property Division Systems Explained

Community Property (9 States)
50 / 50 Split
CA, TX, WA, AZ, NV, NM, ID, LA, WI. All assets and debts acquired during marriage are equally owned. In divorce, marital property is divided 50/50. Pre-marital property is separate — but commingling erases that protection. A prenup explicitly preserves it.

Equitable Distribution (41 States + DC)

Varies (est. 60/40–70/30)

All other states. Courts divide marital property "fairly," which means income, contributions, marriage length, and other factors shape the split. Pre-marital assets are generally separate, but courts can consider them in extreme cases. A prenup removes uncertainty.

What a Prenup Can Protect

Pre-marital savings, investments, real estate, business ownership, intellectual property, future inheritances, gifts, student loans (keeping debt separate), and spousal support terms. A prenup cannot waive child support.

Commingling Risk

When separate property is mixed with marital property (shared accounts, joint improvements to a home), courts may reclassify it as marital. Community property states carry higher risk (25%) because the baseline is 50/50 ownership. Equitable distribution states carry moderate risk (15%).

Prenup Enforceability Requirements

Voluntary Agreement

Both parties must sign freely, without coercion or duress. Courts scrutinize last-minute prenups — sign at least 30 days before the wedding.

Full Financial Disclosure

Both spouses must fully disclose assets, debts, and income. Hiding assets is grounds for invalidation in any state.

Independent Legal Counsel

Both parties should have their own attorney. Using a single attorney — or no attorney — weakens enforceability significantly.

No Unconscionable Terms

A prenup cannot be grossly one-sided. Terms that leave one spouse in poverty while the other retains all wealth are often voided by courts as unconscionable.

Divorce Settlement Comparison — Spouse 1 & Spouse 2

Side-by-side breakdown of divorce outcomes with and without a prenuptial agreement, based on your current inputs.

Scenario	Spouse 1 Receives	Spouse 2 Receives	S1 Protection Value

Bear / Base / Bull — Marital Asset Scenarios

How does prenup protection value change if marital assets differ from your estimate by ±20%?

Asset Distribution — With vs Without Prenup

Outer ring = with prenup · Inner ring = without prenup. Each ring shows Spouse 1 share (left) vs Spouse 2 share (right).

Enter your details in the Calculator tab to see the distribution chart.

Prenuptial Agreement Asset Calculator